i removed my driver side tire and shook the rotor left to right and it felt loose. i shook it up and down and it didnt move. it did the same to the passenger side and it didnt move. so what im asking is what can be loose or probably broken? feels like im driving on rumble strips when i turn slightly to the right. and makes a whole bunch of noise when i hit a pot hole or go over a speed bump. any help would be appriciated.